With the development of modern industry to higher temperature and higher power, the ensleeed wire cannot meet the demand.
High Temperature Enameled Aluminum Wire is a special electromagnetism wire for high temperature and harsh working environments.
Today, I will go into a deep research about this “heat-swaterfied elite” grade product.
What Is High Temperature Enameled Aluminum Wire?
High Temperature Enameled Aluminum Wire is an aluminum-based enameled wire coated with high-temperature resistant insulating enamel.
Core Features:
- Conductor: Aluminum
- Insulation: High-temperature resistant enamel (such as polyamide-imide, polyimide)
- Thermal Class: Usually Class 200 (N) and above
Differences from Ordinary Enameled Aluminum Wire:
| Comparison | Ordinary Enameled Aluminum Wire | High Temperature Enameled Aluminum Wire |
|---|---|---|
| Insulation Material | Polyester, polyester imide | Polyamide-imide, polyimide |
| Thermal Class | 130-180°C | 200-240°C |
| Price | Low | Higher |
| Application | General motors | High temperature, harsh conditions |
IEC Thermal Class Standards
| IEC Class | Max Operating Temp | NEMA/JIS Equivalent | Typical Enamel Material |
|---|---|---|---|
| Class E | 120°C | Class 105 | Polyurethane, polyester |
| Class B | 130°C | Class 130 | Polyester |
| Class F | 155°C | Class 155 | Polyester imide |
| Class H | 180°C | Class 180 | Polyester imide |
| Class 200 | 200°C | Class 200 | Polyester imide/polyamide-imide |
| Class 220 | 220°C | Class 220 | Polyamide-imide |
| Class 240 | Class 240 | Polyimide |
High Temperature Enameled Aluminum Wire usually refers to Class 200 and above products.
High Temperature Insulating Enamel Materials
Polyamide-Imide (AIW / PAI)
Performance Features:
227 classes of heat:
Ultra high mechanical strength:
Outstanding chemical resistance
Excellent scratch resistance
Applications: High temperature motors, motors in harsh conditions, special transformers
Polyimide (PI)
Performance Features:
Thermal class: 240
Highest class of thermal
Radiation resistance;
Superior chemical resistance
Uses: Aerospace, military equipment, nuclear industry
Composite Coatings
Polyester imide/ Polyamide-imide (EIW/AIW): Inner layer polyester imide + outer layer polyamideimide, excellent comprehensive performance, high performance of price ratio
Polyester / Polyamide-imide(PEW/AIW): Internally plastics of yarn, good price performance, universality is obvious.
Core Advantages of High Temperature Enameled Aluminum Wire
Excellent Heat Resistance
Have high long term operating temperature 200– degreesC
Peak temperature in the short term can be 300 degreesC+
Ensures good control of the insulation properties at high temperature
Unique Advantages of Aluminum Conductor
Light weight aluminum density only 30% of copper is very suitable for aerospace and NEV.
Another aspect that works in favor of aluminum is Factor cost advantage Aluminum price about 1/3rd of Copper.
Good Heat Dissipation: The high thermal conductivity of aluminum can be used to reduce operating temperature.
Excellent Mechanical Properties
Consumption of high enamel hardness
‘Scratch resistance’
Resistance to vibrations
Chemical Resistance
Oil resistant
Solvent resistant.
Resistance to acid and alkali
Application Scenarios
- New Energy Vehicle Drive Motors (Core Application)
High power operation (high wattage, power handling). continuous operation. F. Continuous operation at high power (high wattage). continuous operation. G. Limited heat sinking (power handling). Limited heat sinking. H. Long term reliable in high temperature working (special application). - Wind Power Generators
High power, continuous operation, high temperature environment, long lifespan requirements. - Traction Motors
High-speed rail, subway traction system, frequent start-stop, impact large current, high temperature. - Industrial High Temperature Motors
Industrial pumps, fans, compressors and tough condition motors. - Aerospace and Military
Aircraft engines, spacecraft power systems, equipment for severe environment, systemweapon. - High-End Home Appliance Market
High-end inverter aircon, high-end washing machine‘s motor, high-end compressor.
Specifications and Parameters
Conductor Specifications
| Conductor Diameter (mm) | Cross-sectional Area (mm²) | Typical Application |
|---|---|---|
| 0.3-0.5 | 0.07-0.2 | Small precision motors |
| 0.5-1.0 | 0.2-0.8 | Medium motors |
| 1.0-2.0 | 0.8-3.1 | General high-power motors |
| 2.0-5.0 | 3.1-19.6 | Large motors, transformers |
Key Performance Indicators
| Indicator | Class 200 | Class 220 | Class 240 |
|---|---|---|---|
| Max Operating Temp | 200°C | 220°C | 240°C |
| Heat Shock Temp | ≥220°C | ≥240°C | ≥260°C |
| Breakdown Voltage | ≥3000V | ≥3500V | ≥4000V |
| Scratch Resistance | Excellent | Superior | Superior |
| Softening Breakdown | ≥300°C | ≥320°C | ≥350°C |
Selection Key Points
1. Clarify Working Temperature
- Confirm maximum working temperature
- Confirm continuous working temperature
- Consider temperature margin (recommend reserving 15-20°C)
2. Evaluate Working Conditions
- Ambient temperature
- Heat dissipation conditions
- Vibration level
- Chemical environment
3. Select Thermal Class
- General high temperature motors: Class 200
- Harsh condition motors: Class 220
- Extreme environments (aerospace, military): Class 240
4. Verify Supplier Capability
- R&D capability for high-temperature enamel
- Enamel coating process level
- Quality control system
- Industry application experience
Usage Notes
1. Winding Process
Strictly control winding tension, avoid damaging enamel, use specialized winding molds.
2. Welding Process
Aluminum conductors require specialized welding process (argon arc welding or laser welding), enamel needs to be removed first, avoid thermal damage.
3. Impregnation Process
Select impregnating resin compatible with high-temperature enamel, impregnation temperature must be within thermal class, vacuum impregnation provides better results.
4. Storage and Transportation
Avoid direct sunlight, maintain dry environment, prevent mechanical damage.
Cost Analysis
Comparison with High Temperature Copper Wire
| Comparison | High Temperature Enameled Aluminum Wire | High Temperature Enameled Copper Wire |
|---|---|---|
| Weight | Light (~30% of copper) | Heavy |
| Cost | Low | High (~1.5-2x) |
| Performance | Comparable | Slightly better |
| Application | Weight-sensitive, high temperature | Extreme conditions, space-limited |
High temperature enameled aluminum wire is approximately 30-50% cheaper than high temperature copper wire, with comparable performance and lighter weight.
Quality Inspection Key Points
1. Appearance Inspection
Uniform enamel, smooth surface, no bubbles or impurities, consistent color.
2. Dimension Inspection
Conductor diameter tolerance, enamel thickness, overall outer diameter.
3. Electrical Performance
Breakdown voltage, insulation resistance, dielectric loss.
4. Mechanical Performance
Tensile strength, elongation, scratch resistance, flexibility.
5. Thermal Performance
Heat shock test, softening breakdown temperature, long-term thermal aging test.
6. Chemical Resistance
Oil resistance test, solvent resistance test, acid and alkali resistance test.
FAQ
Q: What is the maximum temperature for high temperature enameled aluminum wire?
A: Conventional products 200-220°C. Polyimide enameled aluminum wire can reach 240°C. Short-term peak temperatures can be even higher.
Q: What is the price difference between Class 200 and Class 220 enameled aluminum wire?
A: Class 220 is usually 20-50% more expensive than Class 200. But Class 220 has better performance and longer lifespan.
Q: Can high temperature enameled aluminum wire be used in inverter motors?
A: Yes, but recommend simultaneously using corona resistant enameled wire or corona resistant treated high temperature enameled wire.
Q: Is aluminum conductor high temperature enameled wire easy to weld?
A: Aluminum conductor welding requires professional process. Recommend using argon arc welding or laser welding.
Q: What is the delivery time for high temperature enameled aluminum wire?
A: Standard specifications are usually in stock. Custom specifications typically require 4-8 weeks.
Q: Can high temperature enameled aluminum wire completely replace high temperature copper wire?
A: In most scenarios yes. But in extreme conditions (such as ultra-high power density) or space-limited applications, copper wire may still be necessary.
Summary
High temperature enameled aluminum wire is a key material for modern high-temperature industry.
Core Value:
- Solves insulation problems in high temperature environments
- Aluminum conductor brings lightweight and cost advantages
- Meets long lifespan requirements in harsh working conditions
Application Fields:
- New energy vehicle drive motors
- Wind power generators
- Traction motors
- Industrial high temperature motors
- Aerospace
- Military equipment